河口系统中全氟烷基和多氟烷基物质的浓度在潮汐周期内变化很大

IF 8 1区环境科学与生态学 Q1 ENVIRONMENTAL SCIENCES

Science of the Total Environment Pub Date : 2025-03-25 DOI:10.1016/j.scitotenv.2025.179196

Navneet Singh , Jorge Paz-Ferreiro , Matthew P.J. Askeland , Timothy L. Coggan , Oliver A.H. Jones

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引用次数: 0

摘要

聚氟烷基和聚氟烷基物质由于其广泛存在、不易降解和潜在毒性，目前受到关注。世界各地正在作出重大努力来评估PFAS的环境浓度，但大多数监测都是在一个时间点进行的。很少考虑这些浓度如何随时间变化。在这项研究中，在澳大利亚维多利亚州的三个河口测量了44种PFAS的浓度，每小时超过24小时（两个潮汐周期）。最常见的化合物是PFHxS，最大浓度为72.3 ng/L。在24小时的采样期间，ΣPFAS的浓度显示出4到7倍的差异。环境测量表明，这可能是由于潮汐流入时海水稀释了河口中PFAS的浓度。因此，随机定时采集的样本很有可能错误地描述河口系统中PFAS的真实浓度范围和/或低估目前的最高浓度，这可能导致对此类系统的风险低估。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

Concentrations of per- and polyfluoralkyl substances in estuarine systems can vary greatly within tidal cycles

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Concentrations of per- and polyfluoralkyl substances in estuarine systems can vary greatly within tidal cycles

Per and poly-fluoroalkyl substances are currently of concern due to their widespread occurrence, resistance to degradation and potential toxicity. Major efforts are underway worldwide to assess environmental concentrations of PFAS, but most monitoring is done at a single time point. Little consideration is given to how such concentrations might vary over time. In this study, the concentrations of 44 PFAS were measured hourly over 24 h (two tidal cycles) in three estuaries in Victoria, Australia. The most prevalent compound was PFHxS at a maximum concentration of 72.3 ng/L. Concentrations of ΣPFAS showed between four- and seven-fold differences during the 24-hour sampling period. Environmental measurements showed this was likely due to seawater diluting the concentration of PFAS in the estuary during tidal influxes. Randomly timed grab samples thus have a high risk of mischaracterising the true range of concentrations of PFAS in estuarine systems and/or underestimating the highest concentration present, which may result in an underestimation of risk to such systems.

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来源期刊

Science of the Total Environment 环境科学-环境科学

CiteScore

17.60

自引率

10.20%

发文量

8726

审稿时长

2.4 months

期刊介绍： The Science of the Total Environment is an international journal dedicated to scientific research on the environment and its interaction with humanity. It covers a wide range of disciplines and seeks to publish innovative, hypothesis-driven, and impactful research that explores the entire environment, including the atmosphere, lithosphere, hydrosphere, biosphere, and anthroposphere. The journal's updated Aims & Scope emphasizes the importance of interdisciplinary environmental research with broad impact. Priority is given to studies that advance fundamental understanding and explore the interconnectedness of multiple environmental spheres. Field studies are preferred, while laboratory experiments must demonstrate significant methodological advancements or mechanistic insights with direct relevance to the environment.